If a man says to his slave, `go forth and slaughter the Passover-offering on my behalf`: if he slaughtered a kid, he eats [thereof]. If he slaughtered a lamb, he eats [thereof]. If he slaughtered a kid and a lamb, he must eat of the first. If he forgot what his master told him, how shall he act? He slaughters a lamb and a kid and declares, `if my master told me [to slaughter] a kid, the kid is his [for his Passover-offering] and the lamb is mine; while if my master told me [to slaughter] a lamb, the lamb is his and the kid is mine. If his master [also] forgot what he told him, both go forth to the place of burning, yet they are exempt from sacrificing the Second Passover.

If a man says to his children, `behold, I slaughter the Passover-offering on behalf of whichever of you goes up first to Jerusalem,` as soon as the first has inserted his head and the greater part of his body [in Jerusalem] He has acquired his portion, and he acquires it on behalf of his brethren with him.
One may always register for it as long as there is as much as an olive therein for each one [registered] they may register and withdraw their hands form it until it is slaughtered; R. Simeon said: until the blood is sprinkled.